Database Info

[SOLUTION] Fix for minimum screen brightness! [10/13 - adjustable]

*** Fix for Epic minimum screen brightness ***
*** Update 2: Adjustable version via sysfs interface
EDIT 10/13/2010 0600 UTC: The binary for version 2 that I posted was originally built wrong, lacking an initramfs image. I removed it and posted a new version now, called epic-brightnessfix-kernel02-di18-repaired.zip. The source in the howto.zip was OK. My apologies to the 15 of you that downloaded the broken binary.
As promised, here is a new version with an extensive sysfs interface that allows you to completely tweak brightness and color adjustments without further modifying the kernel. See the README in the attached linuxuberant-brightness-02-howto.zip for instructions. This zip file also contains the full source code.
NOTE: I have been in discussions with Project Voodoo, which may merge this work soon.
Intro
One of widespread complaints with the Epic 4G is that the screen is way to bright for use in a dark room, even with the brightness turned all the way down. So, I modified the brightness controls in the kernel to provide many more steps below the stock kernel's minimum brightness setting.
Since several people claim that minimum brightness on Epic is on par with Evo at 30%, I pushed the 25 discrete brightness levels in the stock kernel up to the range of 30%-100% and added about 10 dimmer levels between 0% and 30%. In addition, I added interpolation between levels so you effectively get much finer control over brightness at all levels.
How to install:
Use Clockworkmod recovery to apply the attached zip file to flash this change. I packaged this as 100% stock Samsung di18 kernel with stock initramfs. The only difference between this and the stock kernel is my brightness change. This means it is safe to try on a stock phone.
md5sum, version 1: 43669330823c2f80c59d152a963325cc
md5sum, version 2: a7da371fcd51c4413a2abb268866e3d7
Affect on permanent Root:
If you currently depend on a custom kernel's initramfs to provide permanent root, then flashing this kernel will lose root for you, because I used the stock initramfs. You can always flash right back to the other kernel after you've played with this. If you rely on the original joeykrim "one click" method of permanent root, this kernel will not interfere with that. If there is interest, I can repackage this using an initramfs that provides permanent root.
Source code:
Only one source file was changed, and it's a mostly simple change. I have attached the whole file as well as a patch that can be applied to a di18 kernel (applies equally well to the dg27 kernel and probably to some of the custom kernels that other developers have made).
What's Next?
I hope that some of the other Epic kernel developers will pick up this patch so that many can benefit from it. I do not intend to become ROM/kernel mod owner myself
My change modifies the low end of the brightness curve aggressively - making possible to get the screen _very_ dark. This suits my needs well, but not everyone will like that. So, I plan to make an enhanced version of this code that will allow you to modify the brightness gamma tables from userspace by writing to special files on sysfs.
Blue Tint Fix?
This brightness tables provides independent control over the red, green, and blue channels, so could be used to fix the blue tint that some people complain about. When I get the userspace access to modify Now that you can modify the table from userspace, feel free to experiment with adjusting the tint.
Enjoy,
Linuxuberant

Awesome work.... This should help battery life for sure. and make people much happier. Mid range needs to be done though. And of course the bright light modes

rjmjr69 said:
Awesome work.... This should help battery life for sure. and make people much happier. Mid range needs to be done though. And of course the bright light modes
Click to expand...
Click to collapse
Thanks! I'm not sure I understand what mean about mid range and bright modes. Can you clarify that a bit? This code covers the whole range of brightnesses, as far as I can tell.

Thanks for working on this. I was just thinking how we need better brightness control.

Nice work dude!

do we flash one of them. i can see one is the kernal and one is the fix but can we flash the fix on the current kernal we have???

dondadah88 said:
do we flash one of them. i can see one is the kernal and one is the fix but can we flash the fix on the current kernal we have???
Click to expand...
Click to collapse
You just flash the kernel (epic-brightnessfix-kernel01-di18.zip). The other zip file contains only source code so you can build it into your own kernel.
-- Linuxuberant

Linuxuberant said:
You just flash the kernel (epic-brightnessfix-kernel01-di18.zip). The other zip file contains only source code so you can build it into your own kernel.
-- Linuxuberant
Click to expand...
Click to collapse
For us tapatalk peeps I can only see the source.
Sent from my SPH-D700 using XDA App

i'm on both. he removed it.

he just signed off did anyone get the kernal???

This will be in the next version of MixUp. I talked to the guy. He's on #TeamBoss with @KyleCole90 and I now. So things will be even better from here on out

dondadah88 said:
i'm on both. he removed it.
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Oh, sorry. I clicked the wrong button when I edited the filename. I just put the attachment back up.

Geniusdog254 said:
This will be in the next version of MixUp. I talked to the guy. He's on #TeamBoss with @KyleCole90 and I now. So things will be even better from here on out
Click to expand...
Click to collapse
That sounds sweet - I'd love for you to pull this into MixUp. Thanks, Geniusdog254.
Linuxuberant

Linuxuberant said:
That sounds sweet - I'd love for you to pull this into MixUp. Thanks, Geniusdog254.
Linuxuberant
Click to expand...
Click to collapse
Thanks for this, but can you please make a variation of this, i feel it's wayyy to dim on my epic. Can you please make multiple downloads of certain percentages of how dim it is. I put the brightness tab where the A in "Automatic" is , i think that's a readable level with auto brightness set it to the lowest brightness or maybe i'm blind .

Then make it brighter I love when its stupid dark
Sent from my SPH-D700 using Tapatalk

dondadah88 said:
Then make it brighter I love when its stupid dark
Sent from my SPH-D700 using Tapatalk
Click to expand...
Click to collapse
Lol no i understand what your saying, but i hate having to manually keep going up and down just was asking if you can make two versions. Not trying to be picky .

Oh oh. This dimness is perfect the white though is very light yellow but other then that I love it.
Sent from my SPH-D700 using Tapatalk

Finally!!!!! I thought this would never happen! Thanks!

Hmm, deleting post due to odd time delay

panthar said:
Hmm, deleting due to odd time delay
Click to expand...
Click to collapse
??
Sent from my SPH-D700 using XDA App

[Q] Does Auto-Brightness better or worsen battery life?

Like the title states- since the Auto-brightness requires a constant running of scripts/ working of sensors, how does it effect battery life in general? Running on Insertcoin 4.4.8 at the moment, and noticed the sensor detects changes way more than the previous versions.
Just a query- an informative answer would be appreciated.
Cheers,
Tony

spit_fire said:
Like the title states- since the Auto-brightness requires a constant running of scripts/ working of sensors, how does it effect battery life in general? Running on Insertcoin 4.4.8 at the moment, and noticed the sensor detects changes way more than the previous versions.
Just a query- an informative answer would be appreciated.
Cheers,
Tony
Click to expand...
Click to collapse
I've read numerous posts that auto-brightness kills more batt, more or less for the reasons you stated. I therefore stopped use auto, rather set it at a certain level and batt improved..
Sent by my feau gee

I also stopped using auto but only as a ROM I'd been using started to "flicker" the screen. I eventually sussed this was due to the phone getting the light levels wrong, since then I've always gone for a manual setting.
EDIT: Oops Off Topic a little, I guess auto could help with battery life as the main drain on the phone is the screen. However, since trying ICS the battery is less of an issue than it was.

Ive always used auto brightness and never had issues. Only time i dim it is at night when driving.
Sent From My steak using A1 steak sauce app (Sensation)

piimp said:
I've read numerous posts that auto-brightness kills more batt, more or less for the reasons you stated. I therefore stopped use auto, rather set it at a certain level and batt improved..
Sent by my feau gee
Click to expand...
Click to collapse
That's what I thought.
gol_n_dal said:
EDIT: Oops Off Topic a little, I guess auto could help with battery life as the main drain on the phone is the screen. However, since trying ICS the battery is less of an issue than it was.
Click to expand...
Click to collapse
True that the main drain is the screen. But with the 'Auto' constantly using the light sensors, I doubt it'd be better for the battery than a constant value. Definitely not the highest brightness setting though. But come to think about it, even the highest setting may use up lesser power than on Auto.

Im sorry to hi-jack this thread but does anyone know where to find the auto-brightness values so i can modify the values to make the screen a bit dimmer, especially in the dark i find the screen far too bright.
Thanks
EDIT: Looking for the values in ICS Rom. Thanks

There used to be a fix for this in GB-roms, but I'm not sure if it has come to ICS yet..

OleEdvard said:
There used to be a fix for this in GB-roms, but I'm not sure if it has come to ICS yet..
Click to expand...
Click to collapse
I have searched this site but all i can find is how to mod the values in GB-roms. The file (arrays.xml) is located in framework-res/res/values. I have looked around in the framework-res of my ICS rom but that folder does not exist!
Hopefully someone can point me in the right direction.

beady_uk said:
I have searched this site but all i can find is how to mod the values in GB-roms. The file (arrays.xml) is located in framework-res/res/values. I have looked around in the framework-res of my ICS rom but that folder does not exist!
Hopefully someone can point me in the right direction.
Click to expand...
Click to collapse
Get Widgetsoid from the market - set custom brightness levels and swap between them with one click via a custom widget, I set steps for 1%, 20%, 30% and auto.

beady_uk said:
I have searched this site but all i can find is how to mod the values in GB-roms. The file (arrays.xml) is located in framework-res/res/values. I have looked around in the framework-res of my ICS rom but that folder does not exist!
Hopefully someone can point me in the right direction.
Click to expand...
Click to collapse
Try using this app called Valis Auto Brightness.my new fav app

beady_uk said:
I have searched this site but all i can find is how to mod the values in GB-roms. The file (arrays.xml) is located in framework-res/res/values. I have looked around in the framework-res of my ICS rom but that folder does not exist!
Hopefully someone can point me in the right direction.
Click to expand...
Click to collapse
ICS its in com.htc.resources.apk

[Q] Possible to set Auto Brightness a bit higher?

Is it possible to set the auto brightness higher than it wants to be? I know I can manually push it higher, but then it does not adjust itself to varying light. What I want to do is keep it on Auto, but have it be always a bit brighter than what it wants to be. Do any of the custom ROMs support that, or is there some other tweak? Thanks!

kalkrishnan said:
Is it possible to set the auto brightness higher than it wants to be? I know I can manually push it higher, but then it does not adjust itself to varying light. What I want to do is keep it on Auto, but have it be always a bit brighter than what it wants to be. Do any of the custom ROMs support that, or is there some other tweak? Thanks!
Click to expand...
Click to collapse
+111111

Another +1111111 for this!
Sent from my Transformer TF101 using XDA

it is definitely somewhere in either the framework or systemui but it would take a lot of digging to find

I found the PERFECT solution in the Market. Look for 'Lux Auto Brightness' (I don't have enough posts to submit links)

Thats awesome, im having the same trouble. +1

This is the only thing I liked about iOS, where you set the brightness level you want, and the auto setting maintains it.
Sent from my Slider SL101 using Tapatalk 2

Franco Kernel vs Stock?

I am debating on whether to buy the pro version and flash Franco's Kernel for my Nexus 5 and 7 (2013). I just want to know what I bits of extra I can really do with it.. And if its worth it. I'm more worried about stability than anything I guess. I don't want to run into little issues whether it be audio, video, whatever it may be. Also I have never flashed a kernel or another ROM, I've always stuck with stock. I am running 4.4.2 right now utilizing Gravity Box and Wanam Kit, and a few other modules. Any input would be greatly appreciated. If this thread has been done before, my apologies. I am a brand new forum user, never really get on the computer.
Sent from my Nexus 5 using Tapatalk

wardawgmalvicious said:
I am debating on whether to buy the pro version and flash Franco's Kernel for my Nexus 5 and 7 (2013). I just want to know what I bits of extra I can really do with it.. And if its worth it. I'm more worried about stability than anything I guess. I don't want to run into little issues whether it be audio, video, whatever it may be. Also I have never flashed a kernel or another ROM, I've always stuck with stock. I am running 4.4.2 right now utilizing Gravity Box and Wanam Kit, and a few other modules. Any input would be greatly appreciated. If this thread has been done before, my apologies. I am a brand new forum user, never really get on the computer.
Sent from my Nexus 5 using Tapatalk
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Click to collapse
Well to be honest the stock kernel allready is very good, the only downsides of it are batterylife/screenontime and colors are not very vibrant. These 2 aspects are substantialy better with Franco kernel. Screenontime and batterylife is improved by at least 50% or more for some (check out the Franco thread). Also you can raise the speaker/mic/in-call volume as you wish and load a color profile for better and more vibrant colors.

if you want stability stick with stock

gee2012 said:
Well to be honest the stock kernel allready is very good, the only downsides of it are batterylife/screenontime and colors are not very vibrant. These 2 issues are substantialy better with Franco kernel. Screenontime and batterylife is improved by at least 50% or more for some (check out the Franco thread). Also you can raise the speaker/mic/in-call volume as you wish and load a color profile for better and more vibrant colors.
Click to expand...
Click to collapse
I have been getting fantastic battery life with my setup now, I just leave brightness at auto, and from my bit of research, that seems to be the big culprit of battery life. I'm always looking to improve my phone in terms of performance and cosmetic, keeps me busy at negative 60 out here in North Dakota lol.
But 50% overall more battery life?! That's pretty friggin good. Would definitely pay for it for that kind of power.
I'm also assuming based on your post that the color control is not for LED control but the screen itself. Any idea if the Xposed LED module works well? I know its off topic just a quick question.
Not sure about the volumes, I usually don't mess with call volumes, but I'll look into it more.
Thanks for your post! Also please post the link to the Franco Thread.
Sent from my Nexus 5 using Tapatalk

wardawgmalvicious said:
I have been getting fantastic battery life with my setup now, I just leave brightness at auto, and from my bit of research, that seems to be the big culprit of battery life. I'm always looking to improve my phone in terms of performance and cosmetic, keeps me busy at negative 60 out here in North Dakota lol.
But 50% overall more battery life?! That's pretty friggin good. Would definitely pay for it for that kind of power.
I'm also assuming based on your post that the color control is not for LED control but the screen itself. Any idea if the Xposed LED module works well? I know its off topic just a quick question.
Not sure about the volumes, I usually don't mess with call volumes, but I'll look into it more.
Thanks for your post! Also please post the link to the Franco Thread.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
If you are having trouble making a decision... just flash the kernel with fastboot and give it a test run. Can the free version of FKU auto flash? I'm not sure, you would have to investigate.
If you decide you like it (and the updates that go along with it), then maybe consider buying the app.
But yes, screen on time is better with FK due to the way the clock speeds scale. A lot better. Even with the stock settings, though I find even those to be a bit aggressive.

wardawgmalvicious said:
I have been getting fantastic battery life with my setup now, I just leave brightness at auto, and from my bit of research, that seems to be the big culprit of battery life. I'm always looking to improve my phone in terms of performance and cosmetic, keeps me busy at negative 60 out here in North Dakota lol.
But 50% overall more battery life?! That's pretty friggin good. Would definitely pay for it for that kind of power.
I'm also assuming based on your post that the color control is not for LED control but the screen itself. Any idea if the Xposed LED module works well? I know its off topic just a quick question.
Not sure about the volumes, I usually don't mess with call volumes, but I'll look into it more.
Thanks for your post! Also please post the link to the Franco Thread.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Most users report a screenontime of about 5-7 hours while stock is about 3,5 hours. Don`t know about the Xposed module but color controll in the Franco kernel updater app is realy good and there are various preloaded settings available. Link thread http://forum.xda-developers.com/showthread.php?t=2508284. Backup your current kernel in the FKU before you flash a Franco kernel, so you can restore it if need be.

Aerowinder said:
If you are having trouble making a decision... just flash the kernel with fastboot and give it a test run. Can the free version of FKU auto flash? I'm not sure, you would have to investigate.
If you decide you like it (and the updates that go along with it), then maybe consider buying the app.
But yes, screen on time is better with FK due to the way the clock speeds scale. A lot better. Even with the stock settings, though I find even those to be a bit aggressive.
Click to expand...
Click to collapse
I believe you can, I'll look into when I get home.
So do you underclock or undervolt? I don't know the differences between the two, my apologies. If I do get Franco I think I will just leave it at the stock settings it comes with before I make any changes, still got learning to do. Thank you for sharing your knowledge!
Sent from my Nexus 5 using Tapatalk

gee2012 said:
Most users report a screenontime of about 5-7 hours while stock is about 3,5 hours. Don`t know about the Xposed module but color controll in the Franco kernel updater app is realy good and there are various preloaded settings available. Link thread http://forum.xda-developers.com/showthread.php?t=2508284. Backup your current kernel in the FKU before you flash a Franco kernel, so you can restore it if need be.
Click to expand...
Click to collapse
That's pretty awesome, definitely gonna try it out. I have a backup somewhere on my device, I think in Flashify, but I'll make another, can never hurt lol.
And thanks for the thread and all the other info!
Sent from my Nexus 5 using Tapatalk

Stick with stock for at least long enough to give yourself a baseline to judge other ROMs/kernels against.

Wakamatsu said:
Stick with stock for at least long enough to give yourself a baseline to judge other ROMs/kernels against.
Click to expand...
Click to collapse
I've had my Nexus 5 for roughly 2 months now I think, are you saying I should wait it out or do more research first? It is very scary for me lol. I'm always afraid to be making major internal changes without some form of consultation and research.
Sent from my Nexus 5 using Tapatalk

Also quick question, I don't need to back anything else up correct? Flashing a kernel does not mess with anything else does it?
Sent from my Nexus 5 using Tapatalk

wardawgmalvicious said:
I've had my Nexus 5 for roughly 2 months now I think, are you saying I should wait it out or do more research first? It is very scary for me lol. I'm always afraid to be making major internal changes without some form of consultation and research.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
I wouldn`t mess with the kernel settings like UV/OC besides color and sound optimisations. The stock settings are allready good enough for most users, only xperienced users should do that imo.
---------- Post added at 06:21 AM ---------- Previous post was at 06:18 AM ----------
wardawgmalvicious said:
Also quick question, I don't need to back anything else up correct? Flashing a kernel does not mess with anything else does it?
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
No, flashing kernels or recovery`s don`t wipe data.

gee2012 said:
I wouldn`t mess with the kernel settings like UV/OC besides color and sound optimisations. The stock settings are allready good enough for most users, only xperienced users should do that imo.
Click to expand...
Click to collapse
That's what I'll do then, what kind of sound optimizations are there? Just the mic volume and whatnot? Or are there some for playing music, I have poweramp and use that equalizer, so just wondering.
Sent from my Nexus 5 using Tapatalk

wardawgmalvicious said:
That's what I'll do then, what kind of sound optimizations are there? Just the mic volume and whatnot? Or are there some for playing music, I have poweramp and use that equalizer, so just wondering.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
You can only raise the volume levels (no EQ settings), this should not interfere with PowerAmp.

gee2012 said:
You can only raise the volume levels (no EQ settings), this should not interfere with PowerAmp.
Click to expand...
Click to collapse
Alright guess I'll just have to carefully play around with a bit. Thanks for your help!
Sent from my Nexus 5 using Tapatalk

gee2012 said:
You can only raise the volume levels (no EQ settings), this should not interfere with PowerAmp.
Click to expand...
Click to collapse
Oh last question, do you know of any stability issues with Franco Kernel? That is my number one concern, so just checking with you real quick before I go with it finally.
Sent from my Nexus 5 using Tapatalk

wardawgmalvicious said:
Oh last question, do you know of any stability issues with Franco Kernel? That is my number one concern, so just checking with you real quick before I go with it finally.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
I haven`t had FC`s when i used the kernel, most issues of users we`re caused by undervolting too much.

gee2012 said:
I haven`t had FC`s when i used the kernel, most issues of users we`re caused by undervolting too much.
Click to expand...
Click to collapse
Alright sounds good! I'll let you know how it goes!
Sent from my Nexus 5 using Tapatalk

wardawgmalvicious said:
Alright sounds good! I'll let you know how it goes!
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Oke, good luck and enjoy

gee2012 said:
Oke, good luck and enjoy
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Click to collapse
OK maybe a stupid question, should I use auto flash or flash via recovery?
Sent from my Nexus 5 using Tapatalk

[Discussion] Bringing up the brightness by a kernel

Is it just possible that some kernel brings up maximum brightness?
Actually I think it is more than likely that HTC would have brought down maximum brightness mostly for battery savings.
Any thoughts about that?

EMJI79 said:
Is it just possible that some kernel brings up maximum brightness?
Actually I think it is more than likely that HTC would have brought down maximum brightness mostly for battery savings.
Any thoughts about that?
Click to expand...
Click to collapse
Well I answer to my own question with this:
https://forum.xda-developers.com/nexus-6/help/screen-brightness-t2941902/post60347394
It seems that Kernel Adiutor offers this option. I will try when I root the phone.

EMJI79 said:
Well I answer to my own question with this:
https://forum.xda-developers.com/nexus-6/help/screen-brightness-t2941902/post60347394
It seems that Kernel Adiutor offers this option. I will try when I root the phone.
Click to expand...
Click to collapse
Please post your results. Thank's